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4-Level Encryption Using DWT in Image Steganography

Author:

Ms. Souma Pal and Prof. Samir Kumar Bandyopadhyay

Subject Area:

Physical Sciences and Engineering

Abstract:

Data and information are spread all over the world. So the secrecy of data is important to our digital world. To maintain the secrecy of data, two efficient approaches are introduced- Cryptography and Steganography. Steganography is the science that deals with conveying secret information by embedding into the cover object invisibly. In steganography, only the authorized party is aware of the existence of the hidden message to achieve secret communication. The message that is to be hidden and the cover medium where the message is hidden may be text, image, audio, video and protocol. In this paper, data (ASCII range 0-255) is embedded within an image (jpg,pgm,png or tiff) by implementing DWT using Hebb rule. Then LSB substitution method is for transmission only the stego-image file and follows the reverse procedure to decrypt the original data.

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